I used to use the Frog Spa floater system. It had one blue cartridge for minerals, and one yellow cartridge for bromine.
Now I want to use the in-filter cartridges, but haven't found the bromine in-filter cartridges online; only the mineral cartridges.
Is there such thing as a Frog Spa in-filter bromine cartridge? If not, how do you use bromine with the Frog Spa in-filter system?